Portable backup power box of electronic cigarette



FIG. 1 is a perspective view of a portable backup power box of electronic cigarette showing the design of the disclosed invention;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof, and the broken lines in the drawing are for the purpose of illustrating unclaimed portions of the portable backup power box of electronic cigarette and form no part of the claimed design;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof; and,

FIG. 8 is a right side view of the portable backup power box of electronic cigarette in an opened position, and the broken lines in the drawing are for the purpose of illustrating unclaimed portions of the portable backup power box of electronic cigarette and form no part of the claimed design. 

CLAIM The ornamental design for a portable backup power box of electronic cigarette, as shown and described. 